A producer is a living thing that makes it's own food. An example would be Wild oat and Otay Tarweed. A decomposer is a living thing that eats dead organism. Like ants, and mushroom. A primary consumer is a living that eats a producer examples would be a coyote, and a garden snail. A secondary consumer is a living thing that eats another secondary consumer. Harris Hawk and Blue Bird are two examples.